First slide

Plant Growth Regulators

Question

The hormone that induces apical dominance and the hormone that acts as an antagonist to this process is

Easy

A

IAA and ethylene
B

NAA and Zeatin
C

IBA and NAA
D

Kinetin and BAP

Solution

Auxin promotes apical dominance and cytokinin inhibits apical dominance. NAA is a type of auxin. Search for natural substances with cytokinin-like activities led to the isolation of zeatin from corn-kernels and coconut milk.

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